pinworm hand drawn icon. human, animal parasite pictogram. infection agent of enterobiasis disease.

worm white structure biology helminth animal ascariasis hookworm vector enterobiasis internal whipworm icon design tapeworm web style dangerous isolated digestive intestine ascarid medicine element human object doodle sick ascaris symbol infographic sketch pictogram sign parasite intestinal background glyph nematode illustration silhouette eelworm health disease pinworm roundworms freehand graphic